Anthraquinone dyestuffs



United States Patent Ofice 3,489,773 Patented Jan. 13, 1970 3,489,773 ANTHRAQUINONE DYESTUFFS Riitger Neetf, Leverkusen, Karl-Friedrich Zenner, Co-

logne-Flittard, Wilhelm Gohrbandt, Leverkusen, and Robert Kuth, Cologne-Muengersdorf, Germany, as-

signors to Farbenfabriken Bayer Aktiengesellschaft,

Leverkusen, Germany, a corporation of Germany No Drawing. Filed May 9, 1966, Ser. No. 548,411

Claims priority, application Germany, May 20, 1965,

F Int. Cl. com 63704,- C09b 1/56 U.S. Cl. 260-3292 7 Claims ABSTRACT OF THE DISCLOSURE Anthraquinone dyestuffs of the general formula:

A-NHCONH larly valuable in dyeing and printing synthetic fiber material, especially aromatic polyesters or cellulose esters.

The present invention relates to anthraquinone dyestuffs of the general formula:

wherein A denotes an anthraquinone radical which preferably contains up to 4 condensed rings, R denotes hydrogen or a. methyl group and n is 1 or 2.

It has been found that valuable dyeings and prints are obtained on synthetic fibre material, especially of aromatic polyesters or cellulose esters, by using as dyestuffs compounds of the general formula given above or mixtures thereof.

The anthraquinone derivatives employed according to the invention may also contain one or several other substituents, e.g. halogen atoms, such as fluorine, chlorine or bromine, hydroxy groups, alkoxy groups, amino groups, acylamino groups, alkylamino groups with 1 to 3 carbon atoms, arylamino groups in which the aryl radical is preferably a phenyl group, which may be substituted by one or several halogen atoms, alkyl or alkoxy groups, alkyl or optionally substituted phenyl-sulphonyl groups, alkyl or optionally substituted phenyl thioether radicals as well as cyano, carboxylic acid ester and acetyl groups. Examples of tetracyclic anthraquiuone radicals are 1,9-isothiazoleanthrone, 1,9-anthrapyrimidine or 1,9- pyrazole-anthrone. The alkyl radicals are preferably lower alkyl radicals which may contain up to 6 carbon atoms. It is of course also possible to use dyestufi mixtures, instead of individual dyestuffs.

The following compounds are examples of the anthraquiuone derivatives used according to the invention:

12:11, on, R=Cl, F

IIIH-CONH l (w R R=H, CH:

R=H, on, R'=H, CH3, OCHz, 002115, F, C].

Q 02 p I NH-C ONH \i R R H S O 2 V NH-C 0-NH R H l 02 3 NH-CO-NH 1E o The dyestutfs according to the present invention may be applied to the following examples of synthetic fibres: fibres of polyamides, polyurethanes, polyacrylonitrile or, preferably, polyesters such as cellulose triacetate, polyethylene terephthalate or esters of 1,4-bis-hydroxymethylcyclohexane and terephthalic acid.

An aqueous dispersion can be used for the dyeing or printing of the polyester materials, e.g. a padding solution or printing paste of the dyestuffs or mixtures thereof, in the presence of carriers at 95-110 C., or in the ab sence of carriers at 120145 C.

Dyeing or printing is preferably carried out according to the theromsol process, in which the printed or dyed polyester materials are briefly heated, possibly after intermediate drying, at temperatures within a range of about 180220 C. The heating is generally carried out for period of 30 seconds to 2 minutes.

The compounds used according to the present invention can be obtained, for example, by reacting appropriately substituted amino-anthraquinones with optionally methylsubstituted tetramethylene-sulphone-3-isocyanates in organic solvents, such as o-dichlorobenzene or nitrobenzene, at 50-220" 0., optionally in the presence of catalysts such as triethylamine.

The compounds used according to the invention can also be produced, for example, as follows: Carbamic acid chlorides, which may be obtained from the reaction of appropriately substituted amino-anthraquinones with phosgene, are reacted with optionally methyl-substituted 3-amino-tetramethylene-sulphones. Alternatively, N-3-tetramethylene-sulphone-carbamic acid chlorides are reacted with appropriately substituted amino-anthraquinones in organic solvents, such as o-dichlorobenzene. or nitrobenzene, in the presence of acid-binding agents, at 20200 C.

The compounds used according to the invention can also be obtained by condensing in organic solvents at 20-200 C. urethanes which can be obtained from the reaction of appropriately substituted amino-anthraquinones with chlorocarbonic acid esters, such as, for "example, the phenyl urethanes, with possibly methyl-substituted S-amino tetra-methylene-sulphones or, alternatively, N-3-tetramethylene-sulphone-urethanes, e.g. phenyl urethane, with appropriately substituted amino-anthraquinones.

The dyeings and prints obtained according to the present invention are characterised by a very good texture, high dyestuff yield and clear shades, and possess outstanding fastness to light, washing, thermofixing and ironing.

In the following examples, which are given for the purpose of illustrating the invention without limiting the same, the parts are parts by weight unless otherwise stated, and the temperatures are given in degrees centigrade.

Example 1 (a) A fabric of polyethylene terephthalate fibres is impregnated on the foulard with a liquor containing 20 gm. per litre of the dyestuff of the formula:

E. n I

and 10 g. of a thermosol auxiliary agent, preferably a polyether as described, for example, in Belgian patent specification No. 615,102. The fabric is then squeezed to a weight increase of 70% and dried in a suspension nozzle drier or drying cabinet at -120". The fabric is subsequently treated wtih hot air in a tenter-frame or nozzle hot flue at 190210 for about 45 seconds, then rinsed, optionally subjected to a reductive after-treatment, washed, rinsed and dried. The reductive after-treatment to remove dyestuif particles superficially adhering to the fibres can be carried out as follows. The fabric is introduced at 25 into a dyebath containing 3-5 cc. per litre of a sodium hydroxide solution of 38 B. and 1-2 g. per litre concentrated hydrosulphite, heated to 70 within about 15 minutes and kept at 70 for a further 10 minutes. The material is subsequently rinsed while hot, acidified at 50 with 2-3 cc./litre formic acid, rinsed and dried. A clear yellow dyeing is obtained which is characterised by its high dyestutf yield and very good texture as well as by outstanding fastness to light, thermo fixing, washing and ironing. A clear yellow dyeing is obtained in a similar manner when, instead of polyethylene terephthalate fibres, there are used polyester fibres obtained from 1,4-bis-hydroxy-methyl-cyclohexane and terephthalic acid, or cellulose triacetate or polyamide fibres.

(b) A previously cleaned and thermofixed fabric of polyethylene terephthalate fibres is printed with a printing paste which consists of the following components: 40 g. of the dyestufi mentioned in Example 1(a), 475 g. water, 465 g. crystal gum (1:2) and 20 g. sulphated castor oil. Instead of crystal gum, an alginate thickening may also be used. To fix the dyestuff the printed and dried material is led at 190-210 over a high capacity tenter frame or through a condensing apparatus. The treatment lasts about 30-60 seconds. The resulting fixed print is subsequently rinsed cold, soaped with 1-2 g./ litre of an anion-active detergent at 70-80 for about 10 minutes, rinsed first hot and then cold and dried. A print similar to the dyeing ofExample 1(a) is obtained, which is characterised by the same outstanding fastness properties. A clear yellow print is obtained in a similar manner if, instead of polyethylene terephthalate fibres, polyester fibres of 1,4-bishydroxy-methyl-cyclohexane and terephthalic acid, or cellulose triacetate or polyamide fibres are used.

(c) 10 parts polyethylene terephthalate fibres are dyed at *130" for 2 hours in a dyebath adjusted to pH 4.5 and consisting of 400 parts water and 0.1 parts of the finely dispersed dyestufi' mentioned in Example 1(a); they are then rinsed and dried. A clear yellow dyeing isobtained which is characterised by outstanding fastness properties.

(d) 10 parts polyethylene terephthalate fibres are dyed at 100 for 1.5 hours in a dyebath adjusted to pH 4.5 and consisting of 400 parts water, 0.1 part of the finely dispersed dyestuff mentioned in Example 1(a) and 1.5 parts o-cre sotic acid methyl ester. A clear yellow dyeing which is characterised by very good fastness properties is obtained.

(e) The dyestufi' used in Example 1(a) can be prepared in the following manner, for example: 40 parts l-aminoanthraquinone are mixed at for 2 hours in 400 parts o-dichlorobenzene and 0.1 part triethylamine with 32 9 parts tetramethylene sulphone-3-isocyanate and stirred at 150 for a further 4 hours. After cooling, the dyestutf, which crystallises in the form of yellow needles, is filtered off under suction, washed with methanol. 66.2 parts (96% of the theoretical) of the dyestufi are obtained the formula of which is given in Example 1(a).

C H N O S (384.3): calculated, S 8.34; found, S 8.23.

(f) The dyestuff used in Example 1(a) can also be produced in the following way: 40 parts l-amino-anthraquinone are-slowlyv mixed at 3080 in 400 parts o-dichlorobenzene and 40 parts pyridine with 37 parts N-3- tetramethylene-sulphone-carbamic acid chloride and then heated at 100-150 until the dyestufi formation is completed. After cooling, the product, which crystallises in the form of yellow needles, is filterd off under suction, and washed with methanol. After drying the same dyestuff as used in Example 1(a) is obtained in a very good yield.

(g) The dyestufi used in Example 1(a) can also be produced in the following manner: 40 parts l-aminoanthraquinone and 50 parts N-3-tetramethylene-sulphonephenyl urethane are heated in 400 parts o-dichlorobenzene at 100180 until the dyestuff formation is completed. After cooling, the product, which crystallises in the form of yellow needles, is filtered off under suction, and washed with methanol; after drying, the same dyestufi? as used in Example 1(a) is also obtained in a very good yield.

Example 2 (a) A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor which contains 20 g. per litre of the dyestuff of the formula:

t) (BE A brilliant yellowish red dyeing is obtained which is characterised by its high dyestulf yield, very good texture and Outstanding fastness to light, thermofixing, washing and ironing. A similar dyeing is obtained when cellulose acetate fibres are used instead of polyethylene terephthalate fibres.

(b) The dyestuff can be obtained in th following manner, for example:

21.5 parts 4-amino-l-hydroxy-anthraquinone are stirred for 5 hours at 150 in 200 parts o-dichlorobenzene and 0.05 part triethylamine with 18 parts tetramethylene-sulphone-3-isocyanate and heated at boiling temperature for 5 minutes. After cooling, the product which crystallises in the form of bright red needles is filtered off under suction and washed With methanol; 34.3 parts, i.e. 95.3% of the theoretical, of the above dyestufi are obtained.

C H N O S (400.3): calculated, S 8.00; found, S, 8.12.

Example 3 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor containing, per litre, 20 g. of the dyestuff of the formula:

A clear orange dyeing is obtained which possesses, be sides very good texture and high dyestufi yield, excellent fastness to light, thermofixing, washing and ironing. Analogous dyeings are obtained when cellulose triacetate fibres are used instead of polyethylene terephthalate fibres.

The dyestuif used can be prepared, for example, by the reaction of 4-amino-l-methoxy-anthraquinone with tetramethylene-sulphone-3-isocyanate in o-dichlorobenzene at according to Example 2(b).

Example 4 When a fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor containing, per litre, 20 g. of the dyestutf of the formula:

a clear yellow dyeing with excellent fastness properties is obtained. If, instead of this dyestutf, a dyestulf of the,

formula:

S 02 fl) IIIH-C ONH is used, a clear yellow dyeing with excellent fastness properties is also obtained. The dyestuffs can be produced by the reaction of 1-amino-6-chloroor 1-amino-6,7-dichloroanthraquinone with tetramethylene-sulphone-3-isocyanate at 150, as described in Example 2(b).

Example 5 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor which contains, per litre, 20 g. of the dyestufi of the formula:

A clear yellow dyeing is obtained which exhibits outstanding fastness properties. A yellow dyeing is also obtained, if, instead of the above dyestulf, a dyestuif of the is used. Both dyestuffs can be produced by the reaction of 1,5- diamino or 1 amino 5 benzoylamino anthraquinone with tetramethylene-sulphone-3-isocyanate in nitrobenzene at ISO-, in the presence of triethylamine as catalyst.

11 Example 6 When a fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor containing, per litre, 20 g. of a dyestuff of the formula:

an intense bluish-red dyeing with excellent fastness properties is obtained. The dyestuif can be obtained by the reaction of 1,4-diarnino-anthraquinone with tetramethylene-sulphone-3-isocyanate in nitrobenzene at ISO-170, in the presence of triethylamine as catalyst.

Example 7 When a fabric of polyethylene terephthalate fibres is dyed according to Example 1(a), a liquor containing, per litre, 20 g. of a dyestuif of the formula:

is used and a bluish-red dyeing showing excellent fastness properties is obtained. A bluish-red dyeing is also obtained if, instead of the above dyestulf, a dyestulf of the formula:

S 02 (l? IITH-C ONH I ll I O NH-C O-CzHs is used. Both dyestuffs can be prepared, for example, by the reaction of l-amino-4-benzoylamirroor Lamina-4- propionyl-amino-anthraqui-none with tetramethylene-sul phone-3-isocyanate in o-dichlorobenzene at 150-160", in the presence of triethylamine as catalyst.

Example 8 When a fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor which contains 20 g, per litre of a dyestufl? of the formula:

so2 11111- 0NH II O NH CH3 a full dark blue dyeing is obtained which exhibits excellent fastness properties. A similar dark blue dyeing with very good fastness properties is obtained if, instead of fabrics of polyethylene terephthalate fibres, fabrics of cellulose triacetate fibres are used. A deep blue dyeing is also obtained if, instead of the above-mentioned dyestufl, a dyestuif of the formula:

(H) NEE-CH Example 9 is employed.

When a fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor which contains, per litre, 20 g. of a dyestulf of the formula:

O NH2 Example Dyestutr S02 IfH-CO-NH I 10 o -Q S02 Il-IH-OONH l 11 Ill 0 ONH 12 Afl fi g \I/ @C-Ha SOz IfH-C ONH I 15 m Example Dyestufl Example 18 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor which contains, per litre, g. of the dyestufi of the formula:

is used, an orange finish is obtained.

14 EXAMPLE 19 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a), With a liquor which contains, per litre, 20 g. of a dyestuif of the formula:

A red-yellow dyeing is obtained which is characterised by very good fastness properties. The dyestufi can be produced, for example, by the reaction of 1-amino-4,5,8- trihydroxy-anthraquinone with tetramethylene-sulphone- 3-isocyanate in o-dichlorobenzene at 150, in the presence of triethylamine as catalyst.

EXAMPLE 20 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor which contains 20 g. per litre of a dyestuif of the formula:

A full reddish-blue dyeing with a high dyestufl yield and excellent fastness to light, thermofixing dan Washing is obtained. If dabrics of cellulose triacetate fibres are used, instead of fabrics of polyethylene terephthalate fibres, then a full reddish-blue dyeing With outstanding fastness properties is also obtained. If, instead of the above dyestuff, a dyestuff of the formula:

0 H WMLCF is used, then fast violet dyeings are obtained on polyethylene terephthalate and cellulose triacetate fibres.

EXAMPLE 21 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor containing 20 g. per litre of the dyestuff of the formula:

and an intense reddish-blue dyeing of very good fastness to light, washing and thermofixing is obtained. If a dye- C1 0 I II N 1 $02 b1 0 CH-CO-NHK is used, instead of the above dyestuff, fast violet shades are obtained on fabrics of polyethylene terephthalate or cellulose triacetate fibres.

EXAMPLE 22 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor which contains g. per litre of a dyestufi of the formula:

which is obtained by bromination of the above dyestuif until an average bromine content of 1 bromine per anthraquinone is obtained is used, then brilliant reddish-blue dyeings with excellent fastness properties are also obtained on polyethylene terephthalate and cellulose triacetate fibres.

EXAMPLE 23 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor which contains 20 g. per litre of a dyestuif of the formula:

A full dark blue dyeing is obtained which is characterised, besides by a high dyestuff yield and very good texture, by excellent fastness to light, washing and thermofixing. If cellulose triacetate fibres are used instead of polyethylene terephthalate fibres, then a full dark blue dyeing With outstanding fastness properties is also obtained. The dyestuff can be prepared, for example, by the reaction of 1,8- diamino-4,5-dihydroxy-anthraquinone wi'th tetramethylenesulphone-3-isocyanate in o-dichlorobenzene at in the presence of triethylamine as catalyst, If, instead of the above dyestuif, a dyestufi of the formula:

nila

which is obtained by bromination of the above dyestuif until an average bromine content of l bromine per anthraquinone is obtained is used for dyeing polyethylene terephthalate or cellulose triacetate fibres, then full dark blue dyeings with very good fastness properties are also obtained.

EXAMPLE 24 When a fabric of polyethylene terephthalate is dyed according to Example 1(a) with a liquor which contains 20 g. per litre of the dyestufi of the formula:

a golden-yellow dyeing is obtained which exhibits, besides a high dyestuff yield and very good texture, excellent fastness to light, washing and thermofixing. If cellulose triacetate fibres are used, instead of polyethylene terephthalate fibres, then a full golden-yellow dyeing with outstanding fastness properties is also obtained. The dyestufif can be prepared, for example, by reacting S-arnino- 1,9-isothiazole-anthrone with tetramethylene sulhpone-3- isocyanatea at 150 in o-dichlorobenzene, in the presence of triethylamine as catalyst. 1f, instead of the above dyestuff, a dyestuff of the formula:

is used, clear greenish-yellow dyeings with excellent fastness properties are obtained on polyethylene terephthalate and cellulose triacetate fabrics.

Example 25 A fabric of polyethylene terephthalate fibres is dyed according to Example 1(a) with a liquor containing 20 g. per litre of the dyestufi of the formula:

and a clear yellow dyeing is obtained which exhibits, besides a high dyestuif yield and very good texture, excellent fastness to light, washing and thermofixing. If fabrics of cellulose triacetate fibres area used, instead of fabrics of polyethylene terephthalate fibres, then clear yellow dyeings with outstanding fastness properties are also obtained. When polyethylene terephthalate or cellulose triacetate fibres are printed according to Example 1(b) with the above dyestutf, clear yellow prints with very good fastness properties are obtained. The dyestutf can be pro duced, for example, by reacting l-amino-anthraquinone with 4-methyl-tetramethylene-su1phone-3-isocyanate in odichloro-benzene at 150160, in the presence of triethylamine as catalyst.

In the following table dyestuffs are listed which are obtained in the manner described in Example 25, as well as their colour shades on polyethylene terephthalate or cellulose triacetate fibres. The dyestuffs are dyed or printed according to Example 1(a) or 1(b).

Ex. Dyestufi Shade so. IIIHCONH I 26 I I; H3 Yellowishl 0 OH s02 NH-oo NH- I 27 w CH3 Orange.

S02 IIIHCONH 2s m 113 Yellow.

S03 H-oo-NH I 29- I OH; Yellow;

1 1| I NH-CONH 0 102 c I\IIHCONH I 30 CH3 Bluish-red.

\/\II/ I SO:

0 NHCONH I I CH3 s02 H-CO-NH I I Bluish-red.

Ex. Dyestufi Shade so, NH-C ONH 32g- I I 6H3 Dark blue.

.s o, o- H 0 ONH (;H3 Bluish-red.

.S 0 n-c O-NH I 34 I I (EH3 Bluish-red. OCaH5 II I 0 NH,

SO; H-o ONH I 35.

CH3 Bluish-red. I s-omorn-oom I 0 NH,

s 0 2 N114: 0 .NH 36 3311s I Bluish-red.

*Q I i O NH:

so, H-o ONH I 31.----- II II CH3 Bluish-red.

)-s0o11= I I 0 NH,

so, lIIH-C ONH I CH3 Bluish-red.

. f O N H:

7 S0: N114: ONH I CH3 s9 I Bluish-red.

' c o o or-o Ha I I o Ex. Dyestufi Shade Ex. Dyestufi Shade @0, s02 NH-CO-NH 01 0 NH-CO-NH II 1 ll l 40 H3 5 4s CHa l l I Violet.

CO-GHa I l g I S02 0 NE, 01 NH-O 0NH S02 CH3 0 NH-OONH u S02 41 M CH3 Bluish-red. 31 b H-GO-NH- I CN 49 cm Reddishblue. 1 0 NH:

l l I SO: HzN O OH 2111-0041114 I Bl h d 42 HO 0 NH--GO-NH 50 I H l Br zHa Reddish- I Br blue. 0 NH:

Ed AH a) ITTHCO-NH l as Br CH3 Red. so,

I H11? NH-CONH I 51 H3 Reddish- 0 (5H blue.

$02 I 1 0 NH-CONH HO 0 011 II I 40 44g Br Ha Orange. S02

I H21 lIIH-CONH- 5 H 52 CH3 R dd 11 0 C e is s 45 Br blue.

S02 l 1 qH-c0NH- HO 0 OH 45 x H; Reddjsh- 53 l 1 blue.

I l GEN NH Golden- 55 02S yellow. 50: NH-CO-NH u I H3 46 11, Violet.

. I 54 w I I i 1 OzN o NHC0NH i Greem'shv yellow- V v 0 s i NH-CONH 5 I v S02 01 0' 'NH-CONH l a 1 11 I 47 l Ha Reddlsh-blue. Example 55 A fabric of polyethylene terephthalate fibres is dyed ac- & cording to Example 1(a) with a liquor which contains 1 0 NH! 20 g. per litre of the dyestuff of the formula.

A clear yellow dyeing with very good fastness properties is obtained. If fabrics of cellulose triacetate fibres are employed, instead of polyethylene terephthalate fibres, then a clear yellow dyeing with excellent fastness properties is also obtained.

What we claims is:

1. Dyestuff having the general formula:

where A is an unsubstituted anthraquinone radical or a substituted anthraquinone radical in which the substituents are selected from the group consisting of fluorine; -chlorine; bromine; hydroxy; nitro; cyano; amino; substituted amino in which the substituent is alkyl of 1 to 3 carbon atoms, C'H -CH OCH CH CHCN, phenyl, or substituted phenyl in which the substituents are chlorine, bromine, methyl, methoxy,

cyano or B,, 80 R wherein R is alkyl of up to 6 carbon atoms, -CH CH OCH or CH CH CN;

wherein R is H, chlorine, bromine, methyl, methoxy or CH CH OCH OR wherein R is alkyl of up to 6 carbon atoms, -CH CH OCH phenyl, methyl phenyl, methoxy phenyl, chlorophenyl or bromophenyl; :SR wherein R is H, alkyl of up to 6 carbon atoms, methoxy, chlorine, bromine, phenyl, chlorophenyl, bromophetiyl, methylphenyl, methoxyphenyl or phenyl CH CH OCH COR wherein R is methyl, ethyl, or propyl; COOR wherein R is alkyl of 1 to 4 carbon atoms; and NHCOR' wherein R is alkyl of from 1 to 4 carbon atoms, CH OC H cyanomethyl, chloromethyl, phenyl, methylphenyl, methoxyphenyl, ethoxyphenyl, fiuorophenyl or chlorophenyl; R is hydrogen or methyl and n is 1 or 2. 5'

2. Dyestutf of the formula:

3. Dyestuff of the formula:

II 0 IH-CO-CzHs 5. Dyestufi of the formula:

6. Dyestutf of the formula:

OH O I II References Cited UNITED STATES PATENTS 3,086,977 4/1963 Turetzky 260272 3,249,626 5/1966 Neef et al. 260329.2 3,412,100 11/1968 Wallace et a1 260329.2

HENRY R. JILES, Primary Examainer C. M. SH-URKO, Assistant Examiner U.S. Cl. X.R.

UNITED STATES PATIFINT OFFICE CERTIFICATE OF CORRECTION Pate 3,489, 773 Dated Jan. 134 1970 Inventor(s) Rutqer Neeff et a1.

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Columr Line I Error 1 68, in the 7 formula R 6 should read 2 7 6 3rd formula NHC| should read NH UNITED STATES PATENT ()FFICE CERTIFICATE OF CORRECTION Patent 3.489.173 Dated Jan 12 mm I Rutqer Neeff et a1. PAGE It is certified that error appears in the above-identified patent and that said Letters Patentare hereby corrected as shown below:

Column Line Error 6 5th formula OS I should read 0 S 7 1st formula II ll 1 should read UNITED- STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,489,773 Dated Jan. 13, 1970 Inventor(s) Rutqer Neeff et al. PAGE 3" It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column Line grror 7 2nd formula if should read 9 48 "th" should read the 13 Example 16 NH- COOCZHS UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent: No. 3,489, 773 Dated Jan. 13, 1970 Inventor(s) Rutger Neeff et al. PAGE .4

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column Qine Error 13 (Continued) should read COOC H 13 Example 17 "SO4 should read 14 I 4]. "dan" should read and 14 42 "dabrics" should read fabrics 16 42 "isocyanatea" should read isocyanate 16 72 "area" should read are I p PATENT omen CERTIFICATE OF CORRECTION intent lio- QIQBQ TB Dutud Jan. 13, 1970 It 10 certifiod that arm: appears in the above-identified patent and that laid Lotta". Patent .11 hcreb'y cot-acted as shown below: 3

- Quinn 1.1m 4 .ifprror 18 Example 32 r 1. "32q"' ahould read 32 p0 should gm: s0;"---- 19 PJ-e 4o 80 hould read 86; "a.

I K 1: Add "Bluiah-red under 19 ample l4 "449'? should read 44 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,489 773 Dated Jan. 13, 1970 Inventor(s) Rutger Neeff et al. PAGE I} It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column Line Error 20 Example 50 C should read S0 21 27 "-CH CHCN, should read can U n 8 NOV. 3 1970 Mac M m In all! I. W. m.

Arrestin 0mm common or PM! 

